Floor surfacing and sandpapering machine.



I J. W. DIXSON & T. MQKINLEY. FLOOR SUBFAGING AND SANDPAPERING MACHINE.

' APPLICATION FILED MAR. 26, 1908. 91 5,080.

9 0% a 1E sh ,H T z N 6s N v R 1- EZ O s VDcdT Rm N W T an. I, A Mm J de w /2 Mm m J a Y P w B WITNESSES UNITED STATES PATENT OFFICE.

JOHN W. nrxson AND TRACY McKINLEY, or SEATTLE, WASHINGTON.

moon SURFACING am: SANDPAPEBING momma.

Patented March 16, 1909.

Application filed March 26, 1908. Serial No. 423,415.

To all whom it may concern:

Be it known that we, JOHN W. Drxson and TRACY MoKmLEY, citizens of theUnited States, residing at Seattle, in the county of King and State ofWashington, have 1nvented certain new and useful Improvements in FloorSurfacing and Sandpapering- Machines, of which the following is aspecification, reference being had therein to the accompanying drawings.

This invention relates to apparatus for dressing floors to uniformsurfaces; and its object is the provision of a machine of this characterwhich will be of inexpensive construction, convenient to operate, andefficient in action. 1

With these ends in View the invention consists in the'novelconstruction, ada tation and combination of parts, as will beiereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of a floor surfacing andsandpapering machine embodying our invention. Fig. 2

is a "lan view of the machine, shown in-.

verte Fig. 3 is an end elevation of the machine.- Fig. 4 is a detailview partly in elevation and partly in vertical sectlon of the surfacecutter-head and associated parts. Figs. 5 and 6 are fragmentary detailviews, in side elevation and transverse vertical section, respectively,of the rotary drum and devices for attaching the sandpa er thereto.

The reference numera 10 designates a frame which is provided with legs11 having journaled in their lower ends the axles 12 of sup orting andtraction rollers 13. Rigid wit said frame are suitable handles,indicated by 14, whereby the machine is menually propelled during therogress of the work. 15 is a shaft which is herein shown with a crank 16at one end for rotatin the same, though it may be, otherwise driven, andcarries a pinion 17 which meshes in the eripheral teeth 18 of agear-wheel18 whic is mounted upon a shaft 19. This wheel is alsoprovided with bevel teeth 18"- which mesh with a bevel gear-wheel 20 uon a shaft 21 having thereon a gear 22 whic meshes with a gear wheel 23carried b a vertical arbor 24. At the lower end of tile arbor 24 it hasconnected thereto a cutter-head 25 in such a manner as to rotatetherewith but movable to a limited extent axially upon the arbor, as bthe'provision of a polygonal socket in the ub 25 of the head to receivea corresponding shaped end of the arbor and employing a stud 26 toextend through the hub 1nto a way 27 formed in the arbor. Detachablysecured to the under face of the head, as

by screws 28, or an equivalent, is an annulus.

29 forming the cutter proper which is constructed of hardened tool steeland provided upon its underside with cutting teeth 29' formed byserrations extending obliquely with respect to radial lines pro ectedfrom the arb'oraxis. The arbor is ournaled at its top in abearing 30 inthe frame 10 and also in a bracket box 31 which is located at somedistance above the hub of the cutter-head so as to aiford a space for ahelical spring 32 serving to hold the cutter yieldingly against thework.

Meshing with the teeth 18 of the aforesaid gear-wheel is anothergear-wheel 33 upon a shaft 34 which carries a gear-wheel 35 which inturn meshes with a gear-wheel 36 upon a shaft 37 This shaft has mountedthereon a drum 38, having longitudinally disposed grooves 39 initsperiphery. A bar 40 is provided for each 0 rected lugs 40 which areapertured with elongated slots 40". In lanes radially with each of thegrooves 39 an in the ends of the drum are screw-threaded holes 41 totake the screws 42 whereby the bars 40 are adjustably secured in therespective drum-slots.

The screws 42 are made with conical heads 42, see Fig. 6, which areadapted to engage the outer ends of the slots 40 and with a The sheetsof sandpaper are each connected from one end to the drum by being clamed in the grooves 39 of the latter, as clear y shown in Figs. 1 and 5,and as they revolve, as represented by the arrow in Fig.

g they will successively wipe against the surcc F of the floor andsmooth the same by the attrition of the gritty faces of the sandpapers.-

The various aforesaid shafts are journaled in suitable supports, such as44, depending from the frame.

In operation, the drum 38 and the cutterhead 25 are caused to rotate ata relatively hi h velocity from motion derived from the driving shaft,while the machine is moved forwardly over the work, resulting in thecutters 29 dressing down the floor to an even the drum grooves and are80 'formed at their ends with rectangularly disurface and the polishingof the same by the sandpapering devices as the latter are progressivelybrought thereover by the onward travel of the machine;

at we claim, and desire Letters-Patent, is

1. In a machine of the t e set forth, a frame, a vertical arbor carrieby the frame, means to rotate said arbor, said arbor having a polygonalshaped lower end, a cutter head having a hub formed with a polygonalsocket to? receive the lower end of sa1d arbor, said lower end of thearbor being formed with an elongated oove, a set screw projected throughsa1d hub and extending in said groove, a cutter secured to said cutterhead, and a coil spring surrounding said arbor and engaging said hub anda part of the frame to yieldingly hold the cutter to its work.

to secure by frame, a vertical arbor journaled in the frame, means torotate the arbor, a cutter 2. In a machine of the type set forth, 7

head yieldingly mounted on said arbor, and rotating therewith, saidarbor being formed with a longitudinal groove, and a set screw carriedby the cutter head to engage in said groove.

3. In a machine of the type set forth, an arbor, a cutter head carriedthereby, and a cutter composed of an annulus secured to said cutter headand a secondv annulus of greater diameterthan the first annulusconnected to the latter and disposed in a differ: ent horizontal planetherefrom, said second face.

In testimony whereof we affix our signatures in presence of twowitnesses.

JOHN W. DIXSON. TRACY MOKINLEY.

Witnesses:

HORACE BARNES, l B. S. ALBmon'r.

annulus havingoutting teeth on its under

